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Finding the Fourth Proportional to 951.32, 1,420.55 and 778.33

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Solution

The fourth proportional to 951.32, 1,420.55 and 778.33 is: 1,162.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.32 : 1,420.55 = 778.33 : x
  2. Step 2: Convert to fraction form
    951.32/1,420.55 = 778.33/x
  3. Step 3: Cross multiply
    951.32x = 1,420.55 × 778.33
  4. Step 4: Simplify right side
    951.32x = 1,105,656.54
  5. Step 5: Solve for x
    x = 1,105,656.54/951.32
  6. Step 6: Final answer
    x = 1,162.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.